The chick embryo chorioallantoic membrane as a model to investigate the angiogenic properties of human endometrium

Item Type:	Article
Title:	The chick embryo chorioallantoic membrane as a model to investigate the angiogenic properties of human endometrium
Creators Name:	Maas, J.W.M. and le Noble, F.A.C. and Dunselman, G.A.J. and de Goeij, A.F.M. and Struyker-Boudier, H.A.J. and Evers, J.L.H.
Abstract:	The chick embryo chorioallantoic membrane (CAM) is an established in vivo angiogenesis assay. The aim of our study was to assess the angiogenic properties of endometrium and to quantitate the vascular response in an accurate way. Samples of proliferative endometrium (n = 17) and control mouse skin tissue (n = 8) were explanted onto the CAM at day 10 of incubation. Additional controls consisted of normal unmanipulated CAM (n = 12). Four days after grafting, photographs of the explant and the surrounding area were taken in ovo to measure the vascular density index (VDI). The VDI is a stereological estimate of vessel number and length, which was obtained by counting the intersections of vessels with a circular grid superimposed on a computerized image. Endometrium caused a significant increase in VDI as compared to both unmanipulated CAM (p < 0.001) and skin tissue as a control (p < 0.007). The intra-observer variability was 5.2%. This study demonstrates that the CAM assay is a suitable model to assess the angiogenic properties of endometrium. Furthermore, it allows detailed quantitation of the vascular response in an objective and reproducible way. Our findings suggest the CAM to be a promising model to study the role of angiogenesis in both normal human endometrium and diseases involving the endometrium.
Keywords:	Angiogenesis, Chorioallantoic Membrane, Endometriosis, Endometrium, Vascular Density Index, Animals, Mice, Chickens
Source:	Gynecologic and Obstetric Investigation
ISSN:	0378-7346
Publisher:	Karger
Volume:	48
Number:	2
Page Range:	108-112
Date:	1999
Official Publication:	https://doi.org/10.1159/000010150
PubMed:	View item in PubMed

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